The Supreme Court handed down an opinion today in Altria Group v. Good (opinion here) which will likely open the door for state-level suits against false advertising by cigarette companies.

Justice Stevens penned the majority opinion and was joined by Justices Kennedy, Souter, Ginsburg, and Breyer. Justice Thomas filed a dissenting opinion that was joined by the Chief Justice and Justices Scalia and Alito.

In a 5-4 decision, the Supreme Court struck down the cigarette-makers’ claim that federal labeling laws preempted state-level action against the content of those labels. See more of our analysis on the cases here and here.